diff --git a/.gitignore b/.gitignore
index d8e0f73..d5178c6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,4 +8,5 @@ config.json
 QR.png
 nohup.out
 tmp
-plugins.json
\ No newline at end of file
+plugins.json
+itchat.pkl
diff --git a/channel/wechat/wechat_channel.py b/channel/wechat/wechat_channel.py
index bc5faf9..dd7580d 100644
--- a/channel/wechat/wechat_channel.py
+++ b/channel/wechat/wechat_channel.py
@@ -95,7 +95,7 @@ class WechatChannel(Channel):
             return
         if match_prefix:
             content = content.replace(match_prefix, '', 1).strip()
-        else:
+        elif match_prefix is None:
             return
         context = Context()
         context.kwargs = {'isgroup': False, 'msg': msg, 'receiver': other_user_id, 'session_id': other_user_id}